Description

This electronic residual current protection relay features a built-in 28 mm transformer, creating a compact, single unit. It is a super-immunized type-A relay with high-frequency current filtering and exceptional immunity, providing true root mean square (TRMS) measurement.

Main Features

• LED display showing:
• Residual current protection parameters
• Protection trip current
• Protection status messages, etc.
• Three programmable contact output relays:
• Main relay for protection, associated with the contact or trigger relay of the circuit breaker
• Two additional relays for pre-alarm notifications
• Voltage-free input for external tripping and rearming
• DIN 46277 rail assembly (EN 50022), occupying 3 modules
• Connection via pluggable terminal strips

Applications

The WRU-10 relays provide intelligent differential protection. Their design ensures maximum safety and continuity of electrical service while minimizing the risk of unwanted tripping.

Instantaneous leakage values are displayed, along with pre-alarm indicators, allowing for effective monitoring of protected lines and facilitating adequate preventive maintenance.